Geometry 1
Create the geometry by using a parametric curve and a polygon.
Parametric Curve 1 (pc1)
1
In the Geometry toolbar, click  More Primitives and choose Parametric Curve.
2
In the Settings window for Parametric Curve, locate the Parameter section.
3
In the Maximum text field, type 8*pi.
4
Locate the Expressions section. In the r text field, type 1+epsilon*cos(s/2).
5
In the z text field, type s.
6
Click  Build Selected.
Polygon 1 (pol1)
1
In the Geometry toolbar, click  Polygon.
2
In the Settings window for Polygon, locate the Object Type section.
3
From the Type list, choose Open curve.
4
Locate the Coordinates section. In the table, enter the following settings:
r
z
1+epsilon
0
0
0
0
8*pi
1+epsilon
8*pi
5
Click  Build All Objects.
6
Convert to Solid 1 (csol1).
7
In the Geometry toolbar, click  Conversions and choose Convert to Solid.
8
Click in the Graphics window and then press Ctrl+A to select both objects.
9
In the Settings window for Convert to Solid, click  Build All Objects.